A design of digital processing circuit for the duo-lateral PSD

Weixiang Zhou; Yanbing Liang; Xiaoyang Wang

doi:10.1117/12.2199670

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15 October 2015 A design of digital processing circuit for the duo-lateral PSD

Weixiang Zhou, Yanbing Liang, Xiaoyang Wang

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Proceedings Volume 9674, AOPC 2015: Optical and Optoelectronic Sensing and Imaging Technology; 96741S (2015) https://doi.org/10.1117/12.2199670
Event: Applied Optics and Photonics China (AOPC2015), 2015, Beijing, China

Abstract

Beam pointing stability control technology detecting the vibration of the optical platform by detectors, using the fast steering mirror compensated the vibration displacement, thereby maintaining a stable beam. Position Sensitive Detector (PSD) as a sensitive position detection system components, its performance significantly affect the overall accuracy of the test system. This article selects Sitek's two-dimensional duo-lateral PSD: 2L20_CP7. By analyzing the measurement principle of the PSD, we designed a reverse bias circuit, I-V converted circuit, A / D converted circuit and control circuit which FPGA as a controller, testing the output current value to verify the reasonableness of the circuit design, and calculate the location information according to formula. We also made a measured grid chart diagram and distortion based on the application of computer, so dose error analysis. We concluded that the linearity of this PSD is better, and it can be applied in the high-precision systems.

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Weixiang Zhou, Yanbing Liang, and Xiaoyang Wang "A design of digital processing circuit for the duo-lateral PSD", Proc. SPIE 9674, AOPC 2015: Optical and Optoelectronic Sensing and Imaging Technology, 96741S (15 October 2015); https://doi.org/10.1117/12.2199670

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